File Name: laser communication transmitter and receiver design .zip
Laser Audio Transmitter. This project is a proof-of-concept device that transmits an audio signal using a laser beam, while removing the need for the user to align the beam themselves. The receiver can be rotated within its horizontal plane, and uses a servo motor controlled by a microcontroller to automatically align it with the receiver.
Who doesn't love lasers? More powerful lasers may cause blindness instantly. If working with a powerful laser, I strongly recommend making a laser lab, and using laser goggles for the frequency of your laser.
This laser communication system transmits sound or music signals through a laser beam. The intensity of the laser beam changes with the amplitude of the sound signal. The voltage variation on the solar panel is amplified by a low-voltage audio power amplifier LM and reproduced by a speaker.
The maximum output of audio amplifier LM is 1 watt, while its voltage gain is 20 to The circuit consists of a transmitter and a receiver. Here a laser diode LD1 with maximum operating voltage of around 2.
The voltage divider network formed by R2, R3 and VR3 keeps the voltage as well as the current for the laser diode in the safe region. In place of the laser diode, you can also use a laser pointer. Remove the battery from the laser pointer. Extend two wires from terminals of LD1 and connect them to the battery terminals of laser pointer. The spring inside the laser pointer is the negative terminal. The output power of the laser pointer is 5 mW. Take care while working with laser, as direct exposure to the laser beam can be hazardous to your eyes.
Point the laser beam to the solar panel. Potmeter VR1 kilo-ohm is used to change the level of the input audio signal. The gain of the amplifier is fixed by capacitor C7. Preset VR4 is used to change the signal level from the solar panel.
This signal is fed to input pin 3 of IC2 through coupling capacitor C5 so that the DC value from the solar panel can be eliminated. Assemble the transmitter and receiver circuits on separate PCBs and enclose in suitable cabinets. In the transmitter cabinet, fix two terminals for connecting the audio signal. Fix switch S1 on the front panel and the laser diode LD1 or laser pointer to the rear side of the cabinet. Keep the 9V battery inside the cabinet.
Fix switch S2 on the front panel and the speaker to the rear side. After assembling both the circuits, orient the laser diode or laser pointer such that the transmitted laser beam directly falls on the solar panel. Use shielded wires for connecting to audio input and solar panel to reduce noise pickup.
Feel interested? Check out other electronics projects. Sign in Join. Sign in. Log into your account. Sign up. Password recovery. Sunday, March 14, Advertise About Us Magazine. Forgot your password? Get help. Create an account. Electronics For You. What are the 10 ohm resistors for that just lead to the ground with a capacitor? Make coils of naked wires from the speaker , and then insert the male jack into them make sure that the coils are far apart from each other.
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This laser communication system transmits sound or music signals through a laser beam. The intensity of the laser beam changes with the amplitude of the sound signal. The voltage variation on the solar panel is amplified by a low-voltage audio power amplifier LM and reproduced by a speaker. The maximum output of audio amplifier LM is 1 watt, while its voltage gain is 20 to The circuit consists of a transmitter and a receiver. Here a laser diode LD1 with maximum operating voltage of around 2. The voltage divider network formed by R2, R3 and VR3 keeps the voltage as well as the current for the laser diode in the safe region.
Laser communication transmitter and receiver design. Background. The theories that govern both RF and optical communications over a noisy channel.
Free-Space Laser Communications pp Cite as. Free-space laser communication systems have the potential to provide flexible, high-speed connectivity suitable for long-haul intersatellite and deep-space links. For these applications, power-efficient transmitter and receiver designs are essential for cost-effective implementation. While spectral efficiency has long been a key design parameter in the telecommunications industry, the many THz of excess channel bandwidth in the optical regime can be used to improve receiver sensitivities where photon efficiency is a design driver. Furthermore, the combination of excess bandwidth and average-power-limited optical transmitters has led to a new paradigm in transmitter and receiver design that can extend optimized performance of a single receiver to accommodate multiple data rates.
Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Spread-spectrum techniques in optical communication using transform domain processing Abstract: A method of applying spread-spectrum techniques to optical communication is presented. The interference-suppression capability of spread-spectrum systems is shown to be enhanced by optical transform domain processing, and a design for spectral coding at optical frequencies is given.
Free-space optical communication FSO is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. This contrasts with using solids such as optical fiber cable. The technology is useful where the physical connections are impractical due to high costs or other considerations. Optical communications , in various forms, have been used for thousands of years. The Ancient Greeks used a coded alphabetic system of signalling with torches developed by Cleoxenus, Democleitus and Polybius. Bell considered it his most important invention. The device allowed for the transmission of sound on a beam of light.
Молча обернулся, бросил взгляд на погруженную во тьму шифровалку и, нагнувшись приподнял тяжелую крышку люка. Она описала дугу и, когда он отпустил руку, с грохотом закрыла люк. Шифровалка снова превратилась в затихшую черную пещеру. Скорее всего Северная Дакота попал в ловушку. Стратмор опустился на колени и повернул тяжелый винтовой замок. Теперь крышку не поднять изнутри.
Куда он поехал? - Слова были какие-то неестественные, искаженные. Панк замер. Его парализовало от страха. - Adonde fue? - снова прозвучал вопрос. - Американец. - В… аэропорт.
А вдруг Танкадо умнее .
Танкадо снова протянул руку. Пожилой человек отстранился. Танкадо посмотрел на женщину, поднеся исковерканные пальцы прямо к ее лицу, как бы умоляя понять. Кольцо снова блеснуло на солнце.
Не может быть! - сказала она по-испански. У Беккера застрял комок в горле. Росио была куда смелее своего клиента. - Не может быть? - повторил он, сохраняя ледяной тон.